Interruptsources - Siemens SIMATIC S5 IP 281 Equipment Manual

Interrupt Processing
Interrupt Sources
The 1P 281 can trigger the interrupt processing on the S5 CPU when various events occur. There
are 6 interrupt sources for each counter. These sources can be enabled bythe respective interrupt
enable register.
7 6 5 4 3 2
0 0
, ,
Several interrupt sources can be enabled for one counter. The triggering event (several if neces-
sary) must be determined in the interrupt program by evaluating the interrupt information register
4 – 6
1 0
Interrupt disabled
0 =
1 = Interrupt enabled
, ,
Interrupt when interrupt value is reached while counting up
Interrupt when interrupt value is reached while counting down
Interrupt for overflow of the counter
Interrupt for underflow of the counter
Interrupt for gate start
R 11/92
1992, Order No: 6ES5998-OKP21